Bryant blow in Moscow
Great Britain's injury tally mounted in Moscow on Saturday as decathlete Ashley Bryant was forced to pull out of the World Championships.
UK Athletics confirmed that the 22-year-old, who had been due to make his senior debut in Moscow, had a hamstring problem.
It is the latest injury blow to strike the British team, which is missing Olympic heptathlon champion Jessica Ennis-Hill because of an Achilles tendon problem.
World 400 metres hurdles champion Dai Greene and Olympic long jump champion Greg Rutherford have also struggled badly for fitness ahead of the championships.
Bryant had already completed three decathlons since May, including a fourth-placed finish at the European Under-23 Championships in Finland.
He said: "Unfortunately I got a grade one hamstring tear last week. I knew I'd be up against it to recover but I thought I had a good chance because it was in good shape in the last few days, so I was hopeful.
"In warm-up today when I had to push it that bit more it wasn't ready for the competition. I'm gutted, but that's sport I guess."
Double Olympic champion Mo Farah was fighting fit as he looked to kick-start the British medal charge in the 10,000m tonight, though.
He has honed his ferocious kick, helped by the sort of speed which saw him break the European 1,500m record in Monaco last month, making him the hot favourite to improve on the silver in won in Daegu two years ago.
On that occasion he was pipped on the line by Ethiopia's Ibrahim Jeilan, an athlete he admitted he had never heard of before the race.
But UKA performance director Neil Black does not fear a repeat this time.
"His expectation is higher than anyone else's," Black told Press Association Sport.
"He will, without doubt, expect to win. It will take an amazing performance for that not to happen.
"He is in great shape. He is a confident guy and looking forward to it. Bring it on, as far as he is concerned. He just wants to get on and enjoy it."
Farah, 30, admits he now has a target on his back every time he races, but he has warned his rivals he is a better athlete this year than at London 2012.
And Black has faith in his ability to deal with the pressure.
"He has an amazing ability to switch and, using his own words, he lives the dream," said Black, who is also acting head coach. "He chills out wherever he is.
"He doesn't let journeys bother him, circumstances bother him - he doesn't let anything get in the way.
"He can use time in a way he finds interesting and exciting, but when it comes to the competition he stays relaxed up until the final few minutes.
"Then he takes a real concentrated approach, purposeful and because he has such huge confidence I think a number of people are beaten before he even steps on the start line.
"I think it is that ability to go from completely chilled, completely relaxed to absolutely targeted, focused and an absolute belief in his ability to perform."
Organisers will be hoping there are plenty more fans in the Luznhiki Stadium to cheer him on, with a very sparse crowd in for the opening morning of competition, in start contrast to the packed houses of London 2012.